> Hi Fabrizio > > Try the Wavecrest website. Dennis Petrich is the PHD at Wavecrest who > wrote their BERT software > based on the bathtub curve. Ron Miller Zanella, Fabrizio wrote: >Does anyone have pointers to detailed explanations of the techniques >required for the following techniques required for 5Gbs and above SI >simulations? >Probability Distribution Function (PDF) plots, Bathtub Curves (CDF). >Also, what is the maximum allowable crosstalk in dB from the surrounding >channels at the operating frequency when measured with respect to the >insertion loss on the channel? > >Thanks,=20 >Fabrizio Zanella > >-----Original Message----- >From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] >On Behalf Of Craig Clewell >Sent: Tuesday, July 27, 2004 8:48 AM >To: clifford@xxxxxxxxxxxxx >Cc: si-list@xxxxxxxxxxxxx >Subject: [SI-LIST] Re: SI Simulation of GHz signals > >Hi Clifford,=20 > >If you are really interested in running the s parameters in HSPCIE to >speed up your simulation times (and your part vendor won't supply them) >you may want to set up an ac analysis for the "parts" and run each one >individually. You can generate the S parameters within HSPICE, or any >other simulator using discrete components. I keep some handy netlists >available that I re-use over and over again that allow me to just drop >in single part models. You also may want to create a macro in Excel, or >a script in MatLab, etc... that will take your output and format it into >a Touchstone file. =20 > >If you do this work up front you can train your monkey to re-use the >netlist and macro over and over again. This will also allow you to >quickly go back and investigate each piece of the system on its own, and >build up a library of S parameter files for devices that you re-use. >When you want to put the system together you can then drop in all the s >parameter files from your library. > >...just an idea > >Craig > > =20 > > > >>Hello >>I would like to perform reliable simulation of GHz signals (up to >>3.125GHz), specifically Xilinx RocketIO. I would like to include in the >>simulation the effects of the following: >>Driver->PCB trace (incl. vias)->connector->cable->connector->PCB >>trace(incl. vias)->Receiver >> >>The models that I have obtained from the various vendors are HSPICE >>models. I have evaluated two of the most recommended S.I. toolchains: >>Mentor G. HyperLynx and Cadence Spectraquest. Both tools use HSPICE as >>the simulation engine, and essentially act as a front-end gui to >> >> >HSPICE, > > >>as well as extracting the PCB trace/via models. My experiences thusfar >>with both tools have not been good. Anything but the most simplistic of >>traces causes the tools to either crash or take rediculous time to >>process (of the order of hours for even a simple net). A further issue >>is that both of these tool vendors claim that the HSPICE simulator is >>not necessary, and that the simulation can be performed without it, but >>practically this is not the case, due to a lack of availability of >>reliable models in anything other than HSPICE format. The conversion >> >> >>from HSPICE to any of the custom modelling types is also, in my >opinion, > > >>non-trivial and potentially an extremely tedious manual process. >> >>I believe that S-Parameter based simulation provides much faster >>simulation, but again there is a lack of availability of S-Parameter >>models. >> >>Can anyone recommend a method for simulating the above signals that is >>simple, robust and reliable, or is the simulation of such signals still >>premature? Coming from a HW design background, I am fairly new to S.I., >>but it seems surprising that there is no industry-standard modelling >>type (equivalent of IBIS) that cable/connector vendors will provide, >> >> >but > > >>maybe this level of simulation is in its infancy, and S-Parameter >> >> >models > > >>will emerge as the standard? >> >>Is the simulation of such signals entirely necessary? I am dubious >> >> >about > > >>the reliability of the results of such simulations, and I am wondering >>whether it is not more practical to just take all the precautions >>possible and hope for the best! >> >>Please let me know if you have any advise, or a good solution to my >>dilemma! >> >>Kind regards, >>Clifford >> >> >> >>------------------------------------------------------------------ >>To unsubscribe from si-list: >>si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field >> >>or to administer your membership from a web page, go to: >>//www.freelists.org/webpage/si-list >> >>For help: >>si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field >> >>List FAQ wiki page is located at: >> http://si-list.org/wiki/wiki.pl?Si-List_FAQ >> >>List technical documents are available at: >> http://www.si-list.org >> >>List archives are viewable at: >> //www.freelists.org/archives/si-list >>or at our remote archives: >> http://groups.yahoo.com/group/si-list/messages >>Old (prior to June 6, 2001) list archives are viewable at: >> http://www.qsl.net/wb6tpu >> >> >> >> >> >> >> >>------------------------------------------------------------------ >>To unsubscribe from si-list: >>si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field >> >>or to administer your membership from a web page, go to: >>//www.freelists.org/webpage/si-list >> >>For help: >>si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field >> >>List FAQ wiki page is located at: >> http://si-list.org/wiki/wiki.pl?Si-List_FAQ >> >>List technical documents are available at: >> http://www.si-list.org >> >>List archives are viewable at: =20 >> //www.freelists.org/archives/si-list >>or at our remote archives: >> http://groups.yahoo.com/group/si-list/messages >>Old (prior to June 6, 2001) list archives are viewable at: >> http://www.qsl.net/wb6tpu >>=20 >> >> >>=20 >> >> >> > > >------------------------------------------------------------------ >To unsubscribe from si-list: >si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field > >or to administer your membership from a web page, go to: >//www.freelists.org/webpage/si-list > >For help: >si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field > >List FAQ wiki page is located at: > http://si-list.org/wiki/wiki.pl?Si-List_FAQ > >List technical documents are available at: > http://www.si-list.org > >List archives are viewable at: =20 > //www.freelists.org/archives/si-list >or at our remote archives: > http://groups.yahoo.com/group/si-list/messages >Old (prior to June 6, 2001) list archives are viewable at: > http://www.qsl.net/wb6tpu > =20 > >------------------------------------------------------------------ >To unsubscribe from si-list: >si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field > >or to administer your membership from a web page, go to: >//www.freelists.org/webpage/si-list > >For help: >si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field > >List FAQ wiki page is located at: > http://si-list.org/wiki/wiki.pl?Si-List_FAQ > >List technical documents are available at: > http://www.si-list.org > >List archives are viewable at: =20 > //www.freelists.org/archives/si-list >or at our remote archives: > http://groups.yahoo.com/group/si-list/messages >Old (prior to June 6, 2001) list archives are viewable at: > http://www.qsl.net/wb6tpu > =20 > > > >------------------------------------------------------------------ >To unsubscribe from si-list: >si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field > >or to administer your membership from a web page, go to: >//www.freelists.org/webpage/si-list > >For help: >si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field > >List FAQ wiki page is located at: > http://si-list.org/wiki/wiki.pl?Si-List_FAQ > >List technical documents are available at: > http://www.si-list.org > >List archives are viewable at: > //www.freelists.org/archives/si-list >or at our remote archives: > http://groups.yahoo.com/group/si-list/messages >Old (prior to June 6, 2001) list archives are viewable at: > http://www.qsl.net/wb6tpu > > > > > ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: //www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List FAQ wiki page is located at: http://si-list.org/wiki/wiki.pl?Si-List_FAQ List technical documents are available at: http://www.si-list.org List archives are viewable at: //www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu